Answer:
A probability is a number that reflects the chance or likelihood that a particular event will occur. Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%.
The correct answer is Timbuktu. It became the greatest city because it was a melting pot for traders from all possible nations because it was wealthy and developed compared to other places. It was a cultural and a trading center because the ruler knew how to rule properly and made Timbuktu one of the greatest cities in the world.
The trips of Marco Polo, also known as the book of wanders or the book of the million, is the title with which the travel book of the Venetian merchant Marco Polo, known in Italy as Il Milione (the million), is usually translated into Spanish.
Thee work is divided into four books. The first describes the lands of the Middle East and Central Asia that Marco Polo crossed on his trip to China. The second book talks about China and the court of Kublai Khan. The third describes several coastal regions of the east Japan, India, Sri Lanka and southeast Asia, as well as the east cost of Africa. The fourth book deals with the wars that the mongols held shortly before, and also describes some regions much further north, such as Russia.
D is the best answer in my humble opinion and would be my best guess